A209223 Number of n X 7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.

40, 1600, 1296, 3312, 6900, 15984, 38232, 80400, 197976, 449228, 1002540, 2382720, 5427180, 12493160, 28565504, 66402540, 153375600, 346691720, 810423876, 1869448176, 4247091288, 9846872812, 22767034560, 52106780512, 119650563196

Offset

1,1

Comments

Column 7 of A209224.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..0..0..1..1..0..0....0..0..1..1..0..1..1....1..1..1..0..1..1..0
..0..1..1..0..0..1..1....0..1..1..1..0..0..1....1..1..0..0..1..1..0
..0..1..1..1..0..1..1....1..1..0..0..1..1..0....0..0..1..1..0..0..1
..1..0..0..1..1..0..0....1..0..0..1..1..1..0....0..1..1..1..0..1..1

Crossrefs

Cf. A209224.

Sequence in context: A170759 A218742 A158703 * A207692 A207927 A208107

Adjacent sequences: A209220 A209221 A209222 * A209224 A209225 A209226

Keyword

nonn

Author

R. H. Hardin Mar 06 2012

Status

approved